Measuring and testing – Volume or rate of flow – By measuring transit time of tracer or tag
Reexamination Certificate
2007-03-05
2010-06-01
Patel, Harshad (Department: 2855)
Measuring and testing
Volume or rate of flow
By measuring transit time of tracer or tag
Reexamination Certificate
active
07726204
ABSTRACT:
A heat signal writing device forming a clear writing pattern of a heat signal is provided. A heat signal writing device10for writing a heat signal in a medium traveling through a channel, which is secured to an appropriate position on the channel through which the medium flows, includes a Peltier element11for writing the heat signal having a temperature change according to a desired pattern by heating or cooling; a channel supporting member12shaped as a pyramid formed of a heat conductive material and having a bottom surface in close contact with a surface of the Peltier element11, the tip of the pyramid being in direct contact with the channel1; a heat sink13in close contact with another surface of the Peltier element11; and a heat-resistant cover for covering the periphery of the Peltier element11, excluding a channel contact surface12aat the tip, and the channel supporting member12.
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International Search Report mailed May 1, 2007, issued on PCT/JP2007/054228.
Imai Hiroshi
Matsushima Keiichi
Ushigusa Yoshihiro
Edwards Angell Palmer & & Dodge LLP
Patel Harshad
Surpass Industry Co. Ltd.
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